Electric oven with internal circulation air duct

Abstract

An electric oven with internal circulation air duct, comprising a shell and an inner container placed in the shell, the shell and the inner container are hollowed out to form a heat dissipation area, a fan is embedded on one side of the heat dissipation area, a wind shell is installed outside the fan, and the wind shell is protruded to form an air duct with the outer wall of the inner container; the upper end of the air duct is bent inward from the inner container body to form an air outlet, and the lower end of the air duct is provided with an air inlet penetrating through the inner container body, hot air enters the air duct through the air inlet and reenters the inner container through the air outlet to realize internal circulation of the hot air. By providing a closed internal circulation air duct with the wind shell, the heating uniformity is significantly improved, and the baking effect of food is improved.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically an electric oven with an internal circulation air duct. Background Technology

[0002] Currently, most household electric ovens use heating elements to directly heat the air inside the oven to bake food. In existing technology, to achieve even heat distribution, electric ovens are equipped with fans. However, the hot air path of these fans is usually quite simple, mostly blowing directly onto the food without creating effective, directional airflow. This results in relatively low temperatures inside the oven, especially in corners or areas far from the heating elements, hindering effective heat transfer. This uneven temperature distribution prevents food in different locations from receiving the same level of heat, leading to inconsistent cooking times. For example, when baking cakes or bread, food near the heating elements may be overheated and burnt, while food further away may not receive enough heat and remain undercooked. Simple hot air circulation or a lack of effective internal circulation design means that heat is not fully utilized within the oven; some heat is lost through the oven walls, resulting in relatively low heating efficiency, prolonged cooking time, and increased energy consumption. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an electric oven with an internal circulation duct that has a simple structure, low manufacturing cost, and a closed internal circulation duct to improve heating uniformity, enhance the baking effect of food, precisely guide hot air, and improve thermal efficiency and energy efficiency.

[0004] The purpose of this utility model is achieved by the following method: an electric oven with an internal circulation air duct, including a shell and an inner liner placed therein, wherein a heat dissipation area is formed by a hollow space between the shell and the inner liner, a fan is embedded in one side of the heat dissipation area, and a fan shell is installed on the outside of the fan, the fan shell protruding and forming an air duct with the outer wall of the inner liner; the upper end of the air duct bends inward from the inner liner body to form an air outlet, and the lower end of the air duct passes through the inner liner body and is provided with an air inlet, hot air enters the air duct through the air inlet and re-enters the inner liner through the air outlet, realizing the internal circulation of hot air.

[0005] The fan is installed at the air inlet end, and a drive motor is installed on the outside of the fan casing and electrically connected to the fan.

[0006] An air guide plate is provided at the upper end of the air outlet, which is bent at an inclination towards the inner liner; the air guide plate and the inner liner are integrally stamped from a metal sheet.

[0007] The air outlet is a frame-shaped through-slot.

[0008] The air inlet is provided in several places.

[0009] The inner wall of the inner liner is provided with a guide platform that protrudes towards the air shell end; the guide platform is located between the air outlet and the air inlet.

[0010] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0011] 2. The enclosed internal circulation air duct in the fan shell significantly improves heating uniformity and enhances the baking effect of food.

[0012] 3. The design of the air guide plate and air guide platform optimizes the flow path of hot air, ensuring precise guidance of hot air, improving thermal efficiency and energy efficiency, and further enhancing heat uniformity.

[0013] 4. The frame-shaped air inlet ensures that the hot air is covered, preventing excessive heat concentration and further enhancing the uniform distribution of hot air. Attached Figure Description

[0014] Figure 1 This is a rendering of the final assembly of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of the inner liner in this utility model.

[0016] Figure 3 This is a schematic diagram of the flow path of the hot air internal circulation in this utility model.

[0017] Figure 4 This is a schematic diagram of the inner liner in this utility model. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings. An electric oven with an internal circulation air duct includes a shell 1 and an inner liner 2 placed therein. A heat dissipation area 3 is formed by a hollow space between the shell 1 and the inner liner 2. A fan 4 is embedded in one side of the heat dissipation area 3. The fan 4 is covered by a fan shell 5. The fan shell 5 protrudes and forms an air duct 6 with the outer wall of the inner liner 2. The upper end of the air duct 6 bends inward from the body of the inner liner 2 to form an air outlet 7. The lower end of the air duct 6 passes through the body of the inner liner 2 and is provided with an air inlet 8. Hot air enters the air duct 6 through the air inlet 8 and re-enters the inner liner 2 through the air outlet 7, realizing the internal circulation of hot air.

[0019] like Figure 1 , Figure 2 , Figure 3As shown: In the structure of the electric oven, a heat dissipation zone is formed by a perforation between the outer shell and the inner cavity, and the fan is installed on one side of the heat dissipation zone. A fan casing is installed outside the fan, and the outward protrusion of the fan casing forms a sealed air duct between it and the inner cavity. An air outlet is located above this air duct, and an air inlet is located below it. When the electric oven is working, the heating elements heat the air inside the inner cavity. The fan starts, drawing the hot air into the air duct through the air inlet. Under the continuous blowing of the fan, the air flows upward along the air duct and is then blown back into the inner cavity through the air outlet. At this point, the hot air forms a closed internal circulation loop between the inner cavity, air inlet, air duct, and air outlet, ensuring that heat is continuously and evenly transferred to the inner cavity. This ensures that food in different locations within the inner cavity is heated evenly, effectively solving the problem of uneven heating in existing technologies, making baking more efficient and resulting in more delicious food.

[0020] Furthermore, the air outlet is designed differently from the traditional setup of several small through holes. The air outlet is formed by bending inward from the inner cavity body, thus creating a larger through channel. This results in more efficient airflow, improved heat transfer efficiency, and enhanced baking performance of the electric oven.

[0021] The fan 4 is installed at the air inlet 8, and a drive motor 41 is installed on the outside of the fan casing 5 and is electrically connected to the fan 4.

[0022] like Figure 3 As shown: The fan is installed at the air inlet end, directly close to the entrance of the hot air duct. When the drive motor starts, the fan can efficiently draw hot air from inside the inner tank directly into the duct through the air inlet, optimizing the hot air intake efficiency and ensuring smooth start-up and continuous operation of the internal circulation system. Simultaneously, the drive motor is installed outside the fan casing, which not only protects the drive motor from the high temperature of the hot air but also facilitates maintenance and heat dissipation, effectively extending the service life of the drive motor and reducing maintenance complexity, making the entire hot air circulation system more stable and reliable.

[0023] An air guide plate 71 is provided at the upper end of the air outlet 7, which is bent at an inclination towards the inner liner 2; the air guide plate 71 and the inner liner 2 are integrally stamped from a metal sheet.

[0024] like Figure 4As shown: Above the air outlet, an air guide plate is installed at an angle, bending inwards from the inner pot body. When hot air blows out of the air outlet, it is precisely guided by the air guide plate. The direction of the hot air flow is no longer simply outward diffusion, but purposefully tilted and blown towards the food area in the inner pot. The hot air can directly and concentratedly act on the food, reducing heat loss in non-effective heating areas, thereby significantly improving heat utilization efficiency. This also means that users can achieve the same cooking effect in a shorter time and reduce energy consumption.

[0025] Secondly, the air guide plate and the inner liner are integrally stamped from metal sheets, making the air guide plate structurally stable and possessing good thermal conductivity.

[0026] The air outlet 7 is a frame-shaped through-slot. For example... Figure 4 As shown: The frame-shaped air outlet allows hot air to enter the inner liner more smoothly. Compared with traditional round or dot-shaped air outlets, it can achieve a wider hot air coverage area, avoid local high wind speeds or heat concentration, and help hot air to diffuse quickly and evenly inside the inner liner, further enhancing the uniform distribution of hot air.

[0027] The air inlet 8 is provided with several. For example Figure 4 As shown: There are several air inlets. Multiple air inlets can more quickly and comprehensively draw in hot air from the inner liner, accelerate the intake speed of hot air, thereby speeding up the circulation of the entire internal circulation, so that the temperature inside the inner liner can quickly reach the ideal state and enhance the uniformity of the internal hot air.

[0028] The inner wall of the inner liner 2 protrudes towards the air shell 5 and is provided with an air guide platform 9; the air guide platform 9 is located between the air outlet 7 and the air inlet 8. Figure 4 As shown: An air guide platform is installed between the air outlet and the air inlet. The air guide platform has an outward protruding design. When hot air enters the air duct, the air guide platform can guide and unblock the flow path of the hot air, further optimizing the flow path of the air duct, making the flow process smoother and more unobstructed, while also reducing unnecessary energy loss.

[0029] In summary: When the electric oven starts operating, the air inside the cavity is heated by the heating elements to bake the food. A fan is installed on one side of the heat dissipation zone formed between the outer shell and the inner cavity, and this fan is covered by a fan casing. The fan casing and the inner cavity body form an air duct. When the fan starts, hot air enters the air duct through multiple air inlets at the lower end of the duct, rises under the fan's force, flows along the duct under the guidance of the air guide, and finally is blown back into the inner cavity through the frame-shaped air outlet. The air duct forms a closed flow space, through which the hot air is effectively controlled, continuously and evenly circulated within the inner cavity. This ensures that heat is applied evenly and efficiently to the food, improving the oven's baking stability and uniformity, and increasing baking efficiency.

[0030] Furthermore, an air guide plate is installed at the top of the air outlet, which is bent at an angle towards the inner liner. The air guide plate can accurately and directly blow hot air directly and concentratedly away from the food inside the inner liner, which significantly improves the heat utilization efficiency and conduction effect, further enhances the uniformity of heat, and makes up for the shortcomings of traditional hot air circulation systems in local areas. Therefore, it can be widely promoted and used.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An electric oven with an internal circulation air duct, comprising a shell (1) and an inner liner (2) therein, wherein a heat dissipation area (3) is formed by a perforation between the shell (1) and the inner liner (2), and a fan (4) is embedded in one side of the heat dissipation area (3), characterized in that: The fan (4) is covered with a fan casing (5), and the protrusion of the fan casing (5) forms an air duct (6) with the outer wall of the inner liner (2). The upper end of the air duct (6) is bent inward from the inner liner (2) to form an air outlet (7). The lower end of the air duct (6) passes through the inner liner (2) and is provided with an air inlet (8). Hot air enters the air duct (6) through the air inlet (8) and re-enters the inner liner (2) through the air outlet (7) to achieve hot air internal circulation.

2. An electric oven with an internal circulation air duct according to claim 1, characterized in that: The fan (4) is installed at the air inlet (8) end, and a drive motor (41) is installed on the outside of the fan casing (5) and electrically connected to the fan (4).

3. An electric oven with an internal circulation air duct according to claim 1, characterized in that: An air guide plate (71) is provided on the upper part of the air outlet (7) and bent at the end of the inner liner (2); the air guide plate (71) and the inner liner (2) are integrally stamped from metal sheet.

4. An electric oven with an internal circulation air duct according to claim 1, characterized in that: The air outlet (7) is a frame-shaped through groove.

5. An electric oven with an internal circulation air duct according to claim 1, characterized in that: The air inlet (8) is provided in several places.

6. An electric oven with an internal circulation air duct according to claim 1, characterized in that: The inner wall of the inner liner (2) is provided with a guide platform (9) protruding towards the air shell (5); the guide platform (9) is located between the air outlet (7) and the air inlet (8).

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